Biology:Cranial fossa

Cranial fossa
	Three cranial fossae and its boundaries.; Purple: Anterior cranial fossa Blue: Middle cranial fossa Green: Posterior cranial fossa Boundaries; 1: Sphenoidal limbus (anterior margin of the chiasmatic groove); 2: Posterior borders of the lesser wings of the sphenoid; 3: Dorsum sellae of the sphenoid bone; 4: Superior borders of the petrous part of the temporal bone; 5: Groove for transverse sinus of the occipital bone
	Anatomical terminology [edit on Wikidata]

Short description: Depression in the cranial cavity

A cranial fossa is formed by the floor of the cranial cavity.

There are three distinct cranial fossae:^[1]

Anterior cranial fossa (fossa cranii anterior), housing the projecting frontal lobes of the brain^[2]
Middle cranial fossa (fossa cranii media), separated from the posterior fossa by the clivus and the petrous crest housing the temporal lobe^[3]
Posterior cranial fossa (fossa cranii posterior), between the foramen magnum and tentorium cerebelli, containing the brainstem and cerebellum^[4]

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v t e Compound structures of skull
Neurocranium	Calvaria Diploë Asterion Pterion Stephanion Inion Bregma Lambda Fossae anterior middle posterior cranial cavity Base of skull Fontanelle anterior posterior sphenoidal mastoid
Facial skeleton	Nasion Gonion
Both	dacryon zygomatic arch temporal fossa infratemporal fossa pterygomaxillary fissure pterygopalatine fossa

Cranial fossa
Three cranial fossae and its boundaries. Purple: Anterior cranial fossa Blue: Middle cranial fossa Green: Posterior cranial fossa Boundaries 1: Sphenoidal limbus (anterior margin of the chiasmatic groove) 2: Posterior borders of the lesser wings of the sphenoid 3: Dorsum sellae of the sphenoid bone 4: Superior borders of the petrous part of the temporal bone 5: Groove for transverse sinus of the occipital bone
*Anatomical terminology* [edit on Wikidata]